corrade-nucleus-nucleons – Rev 26
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describe('getNextIntegerKey', function() {
it('when provided with invalid objects then it returns 0', function() {
expect(getNextIntegerKey({})).toBe(0);
expect(getNextIntegerKey([])).toBe(0);
expect(getNextIntegerKey(null)).toBe(0);
expect(getNextIntegerKey(undefined)).toBe(0);
});
it('when provided with an object with only numeric keys then it returns the next numeric key as integer', function() {
expect(getNextIntegerKey({ 1:'first', 2: 'second', 3: 'third' })).toBe(4);
});
it('when provided with an object with mixed keys then it returns the next numeric key as integer', function() {
expect(getNextIntegerKey({ 1: 'first', 2: 'second', three: 'third' })).toBe(3);
expect(getNextIntegerKey({ 1: 'first', second: 'second', '3': 'third' })).toBe(4);
});
});